Jonas kendall



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JONAS KENDALL, or SOUTH FnAMrNeHAM, AND ADDISON HATHAWAY, or LENOX,

' ASSIGNORS TO ANDREW fr. SERVEN, or LENOX, -MASSAOHUSETTS' Letters Patent No. 79,132, dated JztttevZS, 1868.

IMPROVED MACHINE PGR l?Ol'iIiiliIlllGrv GLASS'.

.T0 lALI; WHOM IT' MAY- CON CERN:

i Beit known that we, JONAS Karmann, of South Framingham, Middlesex county, and'ADpIsoN HTHAWAL of Lenox, Berkshire county, all in' the State of Massachusetts, have invented an Improved Machine for Polishing Glass, Snc.; and we do hereby declarethat the following, taken in `connection with the drawings which 'accompany and form. part of this specication, is a. description of our invention suilicient to enable those skilled in the art to practise it.

The invention relates tothe construction and arrangement of mechanism designed particularly for polishing'gla'ssvplates. u

The general organization of the machine embodying our improvements consists in a horizontal table for holding the plate to be polished, this table having a reciprocating. longitudinal movement undera laterallytraversing or reciprocating carriage, which hasemonnted upon it a series of vertical.1'otary shafts, at the lower end of each of which is a polishing-tool fixed to and rotated by the shaft, the several .polishers being pressed down to the.suri'ace of the Aglass by suitable springs, and the rotating motionof the polishers, together with Vtheir traversinglmotion' across the reciprocating plate, effecting the polishing ofthe whole surface. y

The polishers may be fixed rigidly to their shaft, the polishingfaees being then always horizontal. But as the surface ofthe plate to be polished is not or may not be a perfect plane, thefpolishers in such case fail to uct. uniformly upon the varying surface, and this defect we remedy by so mounting each polisher ou its Vshzrift that its friction-surface has a capability of rocking movement in every direction, and one part of our invention consists in combining with the longitudinally-reciproeating table which holds the plate, and the laterally- 'reciprocating' carriage which carries the polishers, a gang or series of rotary polishers, cach having a capability of rocking Or universalmovement, with reference to the surface against wh-ich it-is pressed.

The drawings represent a machine embodying our invention.

A shows the machine inplan.

B is an end elevation thereof. y u i a denotes a frame, having horizontal ways, b, upon which is mounted estable-,0, for supporting the plate to .be polished, this table-having a. reciprocating movement imparted'to it by means Ofa gcarrack driven by a pinion on a shaft, e, or by any' othersuitable means.

Supported between two uprights, f, is a frame, g, hung from a cross-beam, h," upon screw-shafts t', by, which the frame is raised and lowered.- This frame has horizontal ways, aupon which traverses a reciprocating carriage, l, having suitable bearings, in which rotates a series of vertical shafts, m,fcariyipg at their lower ends the vgang ci' series of polishers, 1,1..

Thefraxne g maybe raised and lowei'edjt'o adjust the polishers to the surface to be polished, byl means of a shaft, o, carrying bevel-gears p, meshing into and rotating gears q, on` the screw-shaft t', the, shaft o carrying at its end a gear, r, rotated by a gear on a vertical shaft, s, this shaft being rotated by gears tu, the latter being on the shaft of a hand-wheel, o.

The vertical shafts m, with the polishers, may be driven fromgears on across-shaft, w, meshing into gears on the tops ofthe-vertical shafts, this shaft u' carrying a pulley, x, driven from'any suitable prime-mover. Each shaft,m, is made capable of au upward-yielding movement, it having for this purpose a spring, e, bearingt its upper end against one of the boxes in which the shaft runs, and at its lower end against a collar fixed upon the shaft.

AThe carriage Z is moved laterally by a'sc'rew-shaft, a, the thread of which works in a nut on the b'ack of thevcarria'gaand,thereby imparts motion'to'thc carriage `in accordzincc with the direction of rotation of the screw-shaft. The direction of movement of 4the carriage is automaticallylreversed at the end of each lateral movement, by working a. shipper-lever, 62, .by means of a rod, c2, sliding loosely through an ear, i?, projecting from the frame, the ear carrying nuts or collars;- dz, one at the limit of 'motion of the carin ea'c'h direction, the' ear striking the nut or collar towards which it is moring, and thereby tipping tlie shipper-lever, and Ashiftingzg p thebelts, as will bereadily understood.

To increase or limit the extent of lateral motion in accordance with the width of theplate to bc polished, the rod c2 may have a screw-thread upon it, by means of which thenuts diane adjustedinposition, so that the movement ofthe carriage is reversed at any desired point; or the collars may be eonin-eandadjusted in posi-v 'tion by suitable screws.

Each polisher is made up of a disk' or circular block,.e2, having on its lower face Vthe polishing-cloth o r other materialifz, confined uponthe disk by a ring or band, g'', or other suitable means.

Each disk e is vconnected tothe shaft by which it is rotated, by a universal joint, h2, this joint permitting the polishing-surface to-tip or rock freely in any ldirection, in perfect accordance with the irregularity or unevenness `of surface of the plato being polished, the spring holding tlierpolisher downto the surface ofthe plate; and

` the joint insuringuniforrn contact lof the polishing-surface with everypart of the plate, thus securing a more perfect-'surface upon the plate than can be obtained in any other manner'known-to lus. Y

'We claim the combination of the horiZontally.reciprocating tableV c, the laterally-reciprocating carriage l, the rotary shafts l171.and the polishers n, when arranged to operate substantially as described.

y We also claim giving to cach p olishe/r a capability of upward-yielding movement by means of a spring, 2, substantially as set forth. V

'We also claim giving to each polisher a capability of rocking movement, substantially as' described. JONAS KENDALL,

t ADDISON HATHAWAY.

'Witnesses FRANcIsGoULn, y C. WARREN BROWN'. 

